Referring to the work scope in 3-factory, it mainly involves with manufacture of curtain wall and the related products. For the production flow, the risk of environmental impact is located in low risk level owing to no emission of industrial waste water, no serious noise source and no direct emission of waste air. It only has general trash, recycling waste (mainly waste aluminum) and limited amount of hazardous waste induced from the manufacturing process. However, the risk of safety is located in high risk level. For instance, most of the risk would induce the fatal occurrence or permanent body injury such as handling lifting appliance lifting gear and hearing loss under long working in noise environment without proper ear protection.